Le 06/10/2013 14:41, Jack a écrit :
Hello,
Le 05/10/2013 22:51, Py Fave a écrit :
in fact my problem is not solved . it seems like the feedback effect happens everywhere but on the surface drawn by the shader .
According to the patch, the feedback is applied on a [square 4] (where there is also the [torus 2]). Then, [gemframebuffer] 'snap' the whole 'inside' [square 4]. And your torus is inside this snapshot (as texels and not vertices).
i use a torus , in perspective wich has a shader applied .
i tried the following workaround(archive is joined ) , but still no luck . the file to open has a OPEN in name .
It seems there is no circle4.geom, [receive13] and [nshader0] objects/abstractions in your .zip.
i would like the dots to have the feedback , or dots + geometry alltogether.
I can't see dot in your patch (or gem window), maybe they come from geometry shader (which is missing) ?
i tried pix_snap2tex ( using gems.feedback from pdmtl abstractions) too but no luck because we can't choose the mixing function . and i would like only white to make trails . and i don't know how to keep the supporting geometry from appearing . the torus should be full black with a white trail only .
A simple possibility is to use 2 torus, a black 'on' a white. And use the white for the trail ?
Attached is an example of that method. Hope it will help you... ++
Jack
An other way :
white torus as texture |__> in the feedback __> output feedback as texture |__> convert white in black texel __> output black torus as texture
Then mix (multiply) black torus with white feedback to get a black torus with white trails. ++
Jack
btw i'm on windows not my choice. i have to share the screen with other programs wich are windows only
any help welcome once more .
Thanks
Pierre-Yves
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